/
SJSASFactory.java
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/
SJSASFactory.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.enterprise.deployment.annotation.factory;
import jakarta.annotation.PostConstruct;
import jakarta.inject.Inject;
import jakarta.inject.Singleton;
import java.lang.annotation.Annotation;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.glassfish.apf.AnnotationHandler;
import org.glassfish.apf.AnnotationInfo;
import org.glassfish.apf.AnnotationProcessor;
import org.glassfish.apf.AnnotationProcessorException;
import org.glassfish.apf.HandlerProcessingResult;
import org.glassfish.apf.factory.Factory;
import org.glassfish.apf.impl.AnnotationProcessorImpl;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.utilities.BuilderHelper;
import org.jvnet.hk2.annotations.Service;
/**
* This factory is responsible for initializing a ready to use AnnotationProcessor.
*
* @author Shing Wai Chan
*/
@Service
@Singleton
public class SJSASFactory extends Factory {
@Inject
private ServiceLocator locator;
private final HashSet<String> annotationClassNames = new HashSet<>();
private final HashSet<String> annotationClassNamesMetaDataComplete = new HashSet<>();
// we have two system processors to process annotations:
// one to process all JavaEE annotations when metadata-complete is false,
// another to process a subset of JavaEE annotations when
// metadata-complete is true
private AnnotationProcessorImpl systemProcessor;
private AnnotationProcessorImpl systemProcessorMetaDataComplete;
@PostConstruct
private void postConstruct() {
if (systemProcessor != null && systemProcessorMetaDataComplete != null) {
return;
}
// initialize our system annotation processor...
systemProcessor = new AnnotationProcessorImpl();
systemProcessorMetaDataComplete = new AnnotationProcessorImpl();
List<ActiveDescriptor<?>> descriptors = locator
.getDescriptors(BuilderHelper.createContractFilter(AnnotationHandler.class.getName()));
for (ActiveDescriptor<?> item : descriptors) {
@SuppressWarnings("unchecked")
ActiveDescriptor<AnnotationHandler> descriptor = (ActiveDescriptor<AnnotationHandler>) item;
String annotationTypeName = getAnnotationHandlerForStringValue(descriptor);
if (annotationTypeName == null) {
continue;
}
systemProcessor.pushAnnotationHandler(annotationTypeName, new LazyAnnotationHandler(descriptor));
annotationClassNames.add("L" + annotationTypeName.replace('.', '/') + ";");
}
}
public AnnotationProcessor getAnnotationProcessor(boolean isMetaDataComplete) {
AnnotationProcessorImpl processor = Factory.getDefaultAnnotationProcessor();
if (isMetaDataComplete) {
processor.setDelegate(systemProcessorMetaDataComplete);
} else {
processor.setDelegate(systemProcessor);
}
return processor;
}
@SuppressWarnings("unchecked")
public Set<String> getAnnotations(boolean isMetaDataComplete) {
if (isMetaDataComplete) {
return (HashSet<String>) annotationClassNamesMetaDataComplete.clone();
}
return (HashSet<String>) annotationClassNames.clone();
}
private static String getAnnotationHandlerForStringValue(ActiveDescriptor<AnnotationHandler> onMe) {
Map<String, List<String>> metadata = onMe.getMetadata();
List<String> answers = metadata.get(AnnotationHandler.ANNOTATION_HANDLER_METADATA);
if (answers == null || answers.isEmpty()) {
return null;
}
return answers.get(0);
}
private class LazyAnnotationHandler implements AnnotationHandler {
private final ActiveDescriptor<AnnotationHandler> descriptor;
private AnnotationHandler handler;
private LazyAnnotationHandler(ActiveDescriptor<AnnotationHandler> descriptor) {
this.descriptor = descriptor;
}
private AnnotationHandler getHandler() {
if (handler != null) {
return handler;
}
handler = locator.getServiceHandle(descriptor).getService();
return handler;
}
@Override
public Class<? extends Annotation> getAnnotationType() {
return getHandler().getAnnotationType();
}
@Override
public HandlerProcessingResult processAnnotation(AnnotationInfo element) throws AnnotationProcessorException {
return getHandler().processAnnotation(element);
}
@Override
public Class<? extends Annotation>[] getTypeDependencies() {
return getHandler().getTypeDependencies();
}
@Override
public String toString() {
return "LazyAnnotationHandler[\n" + descriptor + "\n " + handler + "\n]";
}
}
}